So, I'm thinking of getting hatching eggs and putting a screen over the top of the box to keep the cats and dogs out, but I have some questions about potential heat sources. Has anybody ever used this product ? If so, would you recommend it? Alternately, what specifically have you used, and how well did it work out for you? (I'm considering using it conjunction with a temperature regulator like this one , as I am away from the house for long periods of time.) Any suggestions? Have you used this kind of thing before? Thanks in advance! : ) edit: Ah, I just realized that I posted this in the wrong forum. So sorry! I read "hatching eggs" and mis-assumed.